Interesting - can anyone provide an in-depth comparison to LFE [1]? From a quick look, it looks like Joxa is more similar to Clojure than it is to Common Lisp, whereas LFE takes the opposite appoach.
Those are the core differences. Joxa also has some very clear and distinct goals of its own. Those goals are not really relevant to this discussion though.
If I could rename it then a better name would be EFL (Erlang Flavoured Lisp), which is what it is. The "Flavoured" in the name comes from that I had earlier implemented a Lisp machines flavors system on another lisp, with an english spelling thrown in as a joke.
Second comment: LFE is a Lisp, but it's a Lisp whose first and foremost goal was to allow one to build fully Erlang (and OTP)-compatible systems in Lisp. Clojure's Lisp has a Java flavour; LFE's Lisp has an Erlang flavour. They are both very real and compelling Lisps :-)